Attoenets



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J. JENNINGS.

ROCK DRILLING MACHINE.

No. 362,089. Patented May 3, 1887.

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J. J BNNINGS.

ROOK DRILLING MACHINE. No. 362,089. Patented May 3, 1887.

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JOHN JEN NIN GS, OF CAON CITY, COLORADO, ASSIGNOR TO KITTIE C. .IENNINGS, OF SAM'E PLACE.

ROCK-DRILLING MACHINE.

SPECIFICATION forming part of Letters Patent No. 362.089. dated May 3, 1887.

` Application nica July 13, lest. serial No. 207,941. (No model.)

To all whom it `may concern:

Be it known that I, JOHN JENNINGs, of Caon City, in the county of Fremont and State of Colorado, have invented a new and useful lImprovement in Rock-Drilling Machines, of

which the following is a specification.

This invention relates to rock-drilling machines, and to that class of such machines represented in my Patent No. 342,605, bearing date May 25, 1886.

The presentinvention consists in certain features of construction and novel combinations of parts, aswill be described.

In the drawings, Figure l is a perspective View of my machine, parts being broken away. Fig. 2 is a top plan view of same, parts being broken away; and Figs. 3 and 4: are detail views.

The platform A is provided with legs B, B', and B2, forming a tripod. These legs are pivoted at their upper ends to the platform, and are provided with longitudillal grooves b, in which fit the feet C. I form these feet with notches c, and provide pins D, passed through openings in the legs and engaging said notches, so the feet C may be adjusted to enable the adjustment of the tripod to the ground-surface on which the machine rests.

The legs B l??y are connected by links E E and the nut-bar e. This nut-bar is pivoted at its ends to the links E E, and 'the latter are pivoted to the legs B B2. A screw, F, is journaled to the leg B and threaded through the nut-bar e. By turning this screw the legs may be adjusted together or apart and secured in any suitable adjustment, as will be seen.

The platform A is provided near its edge with perforations 1 to receive the pin 2, which secures the turntable F at any suitable point. This turn-table is pivoted centrally to the platform, and is provided with side ribs or frames, j, formed with ilat horizontal faces 3 and inclined faces 4. Studs 5 proj ect laterally from the turntable F', and are arranged to be engaged by loops or rings 6, secured to the platform, in order to lock the turn-table from turning when so desired, as in lowering the device in a shaft.

On t-he turn-table I pivot at g the frame G,

which is provided with guides or ways H for the driILcarriage.

To the lower end of the frame G, I pivot one end of the rack-bars I, which have notches z', fitted to engage thestuds 5, and thereby secure the frame at any adjustment on the pivots g. It will be noticed that the frame G in its horizontal position rests flat against faces 3 of ribs f, and in its extreme inclined 'positionrests against faces 4, by which construction the rackbars are relieved in large part of the strain they would otherwise bear. The guides Hare adapted to receive the drillcarriage J, which is supported and movable longitudinally in said ways. The devices for driving and feeding the drill may be similar to those shown for such purposes in my former patent above referred to.

In order to secure the drill propel' to the carriage, I provide pivoted latch-bars K and pins k, by which it is retained in its bearings in "cross-bars L of such carriage.

To the frame G, above the carriage, I journal guide-rollers M, and cordsm, being secured to the carriage, pass over said pulleys, and thence to the windlass N, to which they are fixed. This windlass is journaled to the frame G, and is adapted at its opposite end to receive the crank-arm O and handle o, by which it is turned.

On the frame G, I secure concentric with the windlass the rack or racks P, forming a part of the detent for securing such windlass, and by itthe carriage when so desired. The crank and handle may be suitably adapted for connection with the windlass.

To the arm O is pivoted a pawl, Q, whichis provided with a pin, q, to engage rack I?, and is actuated normally into engagement with said rack by a spring, R, as shown. The free end of the pawl moves close to handle o, so that the hand in grasping such handle will adjust and vretain the pawl out of engagement with the rack.

To the upper rear end of the frame G, I pivotally secure the back brace, S, which is preferably formed in adjustable sections, as shown. Handles T may be provided, by which the machine may be moved when on surface work.

To facilitate the raising and lowering of my machine in shafts, I provide it with loops U, secured at or near its upper end, which may be engaged by the hook of the Windlass-rope, as Will be understood from Fig. l.

A Water can and pipe,Vo, are suitably supported for use when desired.

My machine will be found especially useful in drilling vertically downward, or approximately so, and in such instance the drill-earriage may be lowered at intervals,or be left to fall by gravity, as may be found necessary or desirable. Y

Having thus described my in \'ention,what I claim as new is- Y 1. The combination of the drillcarriage having a drill and means for supporting and operating the same, the frame having guides or ways for said carriage, the guide-rollers M, journaled to the upper part of the frame at the opposite sides thereof', the Windlass jour naled to the frame, the cords secured to the opposite sides of the carriage, extended thence up over pulleys M and attached to the Windlass, and a detent, substantially as set forth.

2. The combination of the platform, the drilling devices supported thereon, the legs B B B2, pivoted at their upper ends to said platform, the links E E, pivoted at one end,one

to each of legs B B2, the nut-bar pivoted to and connecting links E, and the screw journaled to leg B and threaded through the nutbar, substantially as set forth.

3. The combination, with the platform, the turntable having studs 5, and the frame mounted thereon and provided with the drillcarriage, of the loops 6, connected with the platform and movable into engagement with studs 5, substantially as set forth.

4. The combination, with the turn table having studs 5 and provided with ribs or frames f, having faces 3 and 4, of the frame G, provided with the drill-earriage and pivoted to the turn-table, whereby it may rest against faces 3 or 4, substantially as set forth.

5. The combination, with the frameand the drill-carriage movable therein, of the Windlass journaled to said frame and having a crank arm and handle, arack secured to said frame concentric with the windlass, and a springy actuated pawl having a pin arranged to engage the rack and pivoted toA the crank-arm, with its end movable alongside the crank-handle, substantially as set forth.

JOHN JENNINGS. TWitnesses:

Rom?. 1B. RUDOLPH, RoBT. D. HALL. 

